The answer is the fourth one (d): owning gold.
Explanation for each option:
a) Refinancing your home mortgage: This option involves adjusting the terms of your existing mortgage, which can potentially lower your monthly payments or interest rate. However, it does not directly preserve economic value for future spending or consumption. Instead, it is a financial strategy to manage debt more effectively.
b) Buying a new car: Purchasing a new car is generally considered a depreciating investment, as cars tend to lose value over time. Therefore, it does not serve as a way of preserving economic value for future use.
c) Obtaining a credit card: A credit card provides a line of credit for making purchases, but it does not preserve economic value. Instead, it can lead to debt if not managed properly, and it involves borrowing rather than saving or preserving value.
d) Owning gold: Gold is traditionally seen as a store of value, especially in uncertain economic times. It tends to retain its value over time and can be used as a hedge against inflation or currency devaluation, making it a suitable option for preserving economic value for future use.
In summary, owning gold is the most appropriate choice for preserving economic value that can be spent or consumed in the future.